function [ systoleVel ] = removePreSystolicPoints( systoleVel,SysStartIdx )

systoleVel(1:SysStartIdx, :) = [];

systoleVel(:, 1) = 1:length(systoleVel);

% Need to pad end of wave with same amount of zeros which were removed in
% order to keep the period length the same

zeroPadding(:, 1) = length(systoleVel):(length(systoleVel) + SysStartIdx);
zeroPadding(:, 2) = 0;

systoleVel = [systoleVel; zeroPadding];

end

